Razor strop



F. M. BU RDITT Dec.' 8, 1925- RAZOR STRAP Filed Mar h 13 1922 2 sheets-sheet 1 Deco 8, F. M. BURDITT RAZOR STRAP Filed March' 13, 1922 v 2 sheets-sneer 2 WAI C06? ein r."

Patented Dec. 8, 1925.

Fnnnnm M. BURDITT, orlnnwron centran, Messner-insiders.

RAZOR SVTROP.

Application filed March 13, 1922. Serial No. 543,258.

To all. whom 'it may concern:

Be it known that I, FREDERIC M. Bmmrr'r, a ,citizenv of the United States, residing in liewton Center, in the county of Middlesex ani-i State of Massachusetts, have invented an lmprovement in Razor Strops, of which the following description, in connection with the accompanying drawings, is a speciiication, like characters' on the drawings representing like parts.

This invention relates to a strop for razors, knivesl and like cutting instruments, and has for its object to provide a superior stropvfor the purpose specified. 1n the preferred embodiment of the invention, a strap is connected with a Supporting frame having expansible and contractible members with which the strap co-operates to be supportedA thereby, and by means of which the strap may be placed under dili'erent tensions to suit` the user.

lt is also preferred to use a leather and a canvas strap located on opposite sides of the supportingframe, andto. provide a common actuating device for the expansible and 'contractible members co-operat-ing therewith.

The expansible and contract-ibis members are construct-ed and arranged so as to place the straps underY tension whensaid members are expanded, and to relieve the straps from tension when contracted, in which latter condition said membersare brought close to the supporting frame and substantially parallel therewith, sol thatV the strop may be broughtintoa compacted condition for car* rying in a traveling bag or for shipping in a carton.

These and other features of this invention will be pointed outin the claims at the'end of this specification.

Fig. 1 is a plan view with parts broken away ofwa razor strop embodying this invention, the upper strap being omitted.

Fig. 2, a longitudinalsection on the line 22,"l`|`ig. 1. f

Fig. 3, a side elevation of the supporting frame shown in Fig. 2, with its expansible and contractible members in their collapsed condition.

Fig. 4L, a section on the line 4 4, Fig. 5.

Fig. 5, a side elevation of the strop with the straps under tension and in condition for use.

lig. G, a plan of the support-ing` frame shown in Fig. 1.

Fig. 7, a cross section on an enlarged scale, taken on the line 7 7, Fig. 5, and

Fig. 8, a detail of one of the nuts to be referred to.

ln the present instance is shown a preferred construction of'razor or like strop, in which two straps a, 5, preferably of leather and canvas respectively, are connected together at their opposite ends to form an endless band or strap, which is connected with a supporting frame provided with expansible and contractible members located wit-hin the endless strap and co-operating with members a, I), thereof, to place them under tension or to relieve them from ten- -sion as will be described.

The supporting frame herein shown is composed of two metal plates or bars 10, 12, preferably of aluminum, which are secured together by rivets c (see Fig. et) or otherwise and are provided with substantially central longitudinally extended concaved portions, Substantially semicircular in cross section, which co-operate to form a tubular housing 13 for a screw-threaded rod 14, which is extended through suitable holes in the endless band and is provided at one end with a head 15 having a flange 16 and at its other end with handle 17 having a ferrule 18,.which bears against a Vmetal washer 19 loosely mounted on the housing 13.

Each strap a, 5has co-operating with it near the opposite ends of the supporting frame, eXpansible and contractible members preferably madesimilar to a toggle. The expansible and contractible member copper ating with the strap a at one end of the latter comprises two. member 20, 21, pivot-ally connected together by the pin 22, the member 20 being pivotally connected bythe pin 23 with the plate or bar 10 and the member 21 being pivotally connected by the pin 24k with a nut25, which is mounted'on the 100 screw rod 14.

The eXpansible and contractible member co-operating with the strap a at its other end comprises members 26, 27, pivotally connected together by the pin 28, the mem- 105 ber 26 being pivotally connected with the plate or bar 1() by the pin 29, and the member 27 being pivotally connected by the pin 30 with a nut 3l, which is mounted on the .screw rod 14;.

The strap b has co-operating with it expansible and contractible members of like construction and numbered the same.

It will thus be seen that the expansible and contractible members practically form togglcs, each comprising two members which are pivoted together and one ot' which is anchored to the supporting trame and the other or' which is connected with a nut which is movable toward and from the anchored end,` so as to move the free end ot the anchored member toward and away from the screw rod 14.

In the collapsed condition of the strop, the expansible and contractible members assume a. pcsition substantially parallel with the screw rod lst in proximity thereto as represented inFig. 3, and in the expanded condition of the strop, said members assume inclined positions with relation to said screw rod (see Figs. 2 and 5).

Then the strop is in its extreme collapsed condition, the expansible and contractible members assume the position shown in Fig. 8, in which the nuts 25, 3l, are removed the furthest from the anchored ends 23, 29 of the said members.

By turning the screw rod li in the proper direction, the nuts 25, 3l, are caused to move on the screw rod toward the anchored ends 23, 29 of the expansible and contractible members, and the members 2l, 27 push the members 20, 2G, up into an inclined position and cause the members 20, 26, to engage the straps a., b, and place them under tension, the amount of which can be governed by the screw rod 14.

By turning the screw rod 14 in the opposite direction, the nuts 25, 31, are caused to travel on the screw rod 14 away from the anchored ends 28, 2S), of the toggles or eX- pansible members, and when said nuts are moved into their extreme position shown in Fig. 8, the straps a, b, are relieved from tension and can be brought close to the supporting frame for packing or shipping purposes.

It. will be observed that by means of the` screw rod 14e, the expansible members may be placed in proper position to put the straps a, Z), under the tension desired by the operator.

In the presentinstance, the strop is represented as novided with two straps a, b, one ot leather and the other of canvas or other suitable material and while it may be preferred to use two straps and two sets of expansible and contractible members cooperating therewith, it is not desired to limit the invention in this respect, as it is evident that one ot' the straps and its cooperating expansible members mav be omitted if desired.

Claims.

l. In a strop for razors, knives and like instruments, in combination, a supporting frame, an endless strap connected therewith, a screw-rod mounted to turn in said supporting frame, nuts mounted on said screw rod, toggles located between said supporting trame and said endless strap and having members pivotally anchored to said supporting` frame and other members pivotally connected with said nuts.

In a strop for razors, knives and like instruments, in combination, a supporting frame, a strap connected therewith, a screw rod mounted to turn in said supporting trame, nuts mounted on said screw rod and expansiblc and contractible members comprising toggles anchored at one end to said supporting frame and connected at their other end to said nuts to be moved therewith to cause the anchored members of said teggles to place the said strap under tension.

3. In a strop for razors, knives and like instruments, in combination, a supporting frame, a strap connected therewith, a screw rod mounted to turn in said supporting trame, a nut mounted on said screw rod to be moved longitudinally thereof by rotation of said screw rod, and expansible and col,

lapsible means engaging said strap and actuated by said nut for placing said strap under tension.

4i. In a. strop for razors, knives and like instruments, in combination, a supporting frame, an endless strap connected there with, expansible and contractible members located on opposite sides ot' the supporting frame cooperating with said strap to support the material length thereof between the same, and a common actuating device carried by the supporting frame and operatively connected with said expansible and contractible members for laterally moving the strap to stretch it between said expansible and contractible members.

In testimony whereof I have signed my name to this specilication.

FREDERIC M. BURDITT. 

